we don't change mac/ip by default

This seems to be a bit tricky as facter not always report the correct mac.

managed hosts will not be auto updating by default, however one could still
define the ignore_puppet_facts_for_provisioning settings.

fixes #1115 Host parameters are not available via the API

don't allow to delete a provisioning template when its assigned to an OS default template

[ec2] added the ability to create multiple security groups

ensure that facter mac addressed and formatted correctly when imported into foreman

ensure that you can't delete a compute resource while its used - fixes #1683

minor fixes to host show page

added vm tab

host show folded into tabs.

fixes #1678 - nested hostgroup selector for templates.